JPH0645405Y2 - Hydraulic control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hydraulic control valve used in a brake device of a vehicle or the like.

[Conventional technology]

As a hydraulic control valve of this type, there is a conventional one described in Japanese Utility Model Laid-Open No. 59-63064.

This hydraulic control valve has a valve device capable of interrupting communication between the inlet chamber and the outlet chamber defined in the main body, and a plunger for opening and closing the valve device. When the pressure in the inlet chamber and the outlet chamber rises to a predetermined pressure, the plunger moves in the direction to close the valve device against the spring force of the preload spring.

[Problems to be solved by the invention]

In this conventional hydraulic control valve, one end of the preload spring is engaged with the plunger through the spring bearing and the other end is engaged with the lid member of the main body through the other spring bearing. The other spring receiver engaging with the member has an outer diameter smaller than the inner diameter of the inlet chamber, and is only externally fitted to the plunger and pressed against the lid member by the spring force. It is easy to be installed in a tilted position and compress as it is. In such a case, there is a problem that prying and sliding scratches due to the tipping of the plunger due to the eccentric load of the preload spring will result in poor performance. .

Japanese Unexamined Patent Publication No. 58-67550 discloses a spring bearing engaged with the inner peripheral surface of the main body. The spring bearing of the main body includes a casing and a lid member accommodating a sealing member. Since the outer circumference is fitted to the inner circumference of the casing, there is a problem that the required pressure input is large at the time of mounting to the casing and the mounting property is not good, and the sealing member before mounting the lid member to the casing. There is also a problem that sealing failure occurs because the mounting direction and elastic contact state cannot be confirmed.

The present invention has been made in order to solve the above-mentioned conventional problems, and a spring bearing for receiving one end of a preload spring can be easily mounted in a correct posture. An object is to provide a hydraulic control valve that can be prevented in advance.

[Means for solving problems]

In order to achieve the above object, the present invention provides a spring bearing for receiving one end of a preload spring, which has an inner hole into which the plunger is loosely fitted, and has an outer periphery of a flat plate ring shape having a plurality of cutouts. The recessed portion of the lid member is press-fitted to cover the recessed portion, and the cutout defines a visible gap between the inner peripheral surface of the recessed portion and the outer periphery of the sealing member.

[Action]

In the present invention, the spring bearing for receiving one end of the preload spring is press-fitted into the recess of the lid member that houses the sealing member.
Since the cut-off portion does not come into contact with the inner peripheral surface of the recess, the pressure input is low, and since the flat plate has no front-back directionality, it has excellent mountability and can be easily mounted in the correct posture.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a main body of a hydraulic control valve, which is composed of an assembly of a cylindrical member 3 having an inner hole 2 having one end opening and a lid member 4 closing the opening. The inner hole 2 of the main body 1 is a stepped hole in which a small-diameter hole 6, a large-diameter hole 7, and an opening hole 8 having a slightly larger diameter than the large-diameter hole 7 are sequentially connected in series, and the opening hole 8 has the above-mentioned structure. The lid member 4 is fitted. The lid member 4 opens toward the inner hole 2 and the recess 9 into which the sealing member 13 is fitted and the recess 9 are formed.
Has a stepped concave portion 11 formed of a hole portion 10 opening at the bottom of
An air bleed passage 12 is formed at the bottom of 10. At the opening-side end 9a of the recess 9 of the lid member 4, a fitting recess 9b having an inner circumference larger than that of the other part of the recess 9 is formed.
A spring receiver 18 described later is fitted in 9b.

A plunger 14 is slidably accommodated in the inner hole 2 of the main body 1. The plunger 14 has a stepped shape having a large diameter portion 15 on one end side, and the large diameter portion 15 is inserted into the small diameter hole 6 of the inner hole 2 through the sealing member 16 and the other end portion 17 is formed into the sealing member 13. The other end of the preload spring 19 is slidably inserted into the hole 10 of the lid member 4 and accommodated in the inner hole 2, and one end of which is supported by the lid member 4 via the spring receiver 18 It is urged toward the small-diameter hole 6 side by being supported via 20 and the outlet chamber A is inserted in the small-diameter hole 6.
, An inlet chamber B is defined in the large diameter hole 7, and a pressureless chamber C is defined in the hole portion 10.

As shown in FIG. 2, the spring receiver 18 has an inner hole Z in which the other end 17 of the plunger 14 is loosely fitted, and three concentric arc portions a and three cut-offs Y are alternately continuous. It is a substantially polygonal flat plate ring having an outer periphery, and is pressed into the fitting recess 9b of the lid member 4 by being brought into contact with a step portion X formed between the fitting recess 9b and the other part of the recess 9. -It is fitted. The cut-off Y of the spring receiver 18 defines a gap G between the inner peripheral surface of the fitting recess 9b, and this gap G passes from the opening end side of the lid member 4 through the gap G to the recess 9 The outer peripheral portion of the sealing member 13 inside is sized to be visible.

The plunger 14 is a passage that connects the inlet chamber B and the outlet chamber A.
It has 21 inside. This passage 21 is a radial passage 22
And a passage 23 in the radial direction opening toward the outlet chamber A, and a valve member 25 constituting a valve device 24 is housed in the passage 23 so as to be able to block between the inlet chamber B and the outlet chamber A. The valve member 25 has a stem 26 urged by a valve spring 28 so that it can be seated on a seat member 27 having a hole 27a attached to the end of the passage 23 and is pressed against the closed end 5 of the inner hole 2.

The main body 1 is formed with an outlet 30 communicating with the outlet chamber A and an inlet 31 communicating with the inlet chamber B. The outlet 30 generates a brake cylinder of a vehicle (not shown) and the inlet 31 generates a brake fluid pressure (not shown). The pressure chamber of the master cylinder is connected through piping.

In addition, this hydraulic pressure control valve is another device with an appropriate hole,
For example, it is used by inserting and fixing it in holes arranged in parallel with the cylinder holes of the master cylinder.

Next, the operation of the hydraulic pressure control valve of this embodiment will be described.

Now, assuming that the brake is not applied and the hydraulic pressure is not generated in the pressure chamber of the master cylinder, the respective members are at the positions shown in the drawing, and the valve member 25 is separated from the seat member 27 and the valve device is released. 24 is open.

In this state, if the driver or the like operates the master cylinder to generate hydraulic pressure, the hydraulic pressure is low while the hydraulic pressure is low.
It is transmitted to the inlet chamber B through the inlet 31, passes through the passage 23-27a-the outlet chamber A, and is transmitted to the brake cylinder through the pipe from the outlet 30 without being decompressed. After that, when the hydraulic pressure rises and the pressure acting on the difference area between the pressure receiving area S1 of the plunger 14 for the inlet chamber B and the pressure receiving area S2 (> S1) of the outlet chamber A rises to a predetermined value, the plunger 14 in the figure The seat member 27 and the valve member 25 come to be seated by moving to the right, and the valve device 24 closes. After this,
The pressure in the outlet chamber A is controlled to be reduced at a predetermined ratio as is well known in the art.

Although the spring receiver 18 in this embodiment has a substantially polygonal shape,
Since there are three concentric arc portions (fitting portions) a that can be inscribed in the inner peripheral surface of the fitting recess 9b, the inner peripheral surface of the fitting recess 9b is used as a guide in the fitting recess 9b. By press-fitting, the fitting recess 9b can be mounted in the correct posture without tilting.

Moreover, since the spring receiver 18 has a polygonal shape having cut-offs Y at a plurality of positions and is pressed against the inner peripheral surface of the fitting recess 9b only at the arcuate portion a, the spring receiver 18 is moved to the fitting recess 9b as compared with the case of the conventional example. It requires less pressure and has excellent wearability.

Further, since the gap G is formed due to the cutoff Y of the spring bearing 18, air does not remain in the gap between the spring bearing 18 and the sealing member 13 during the air bleeding work.
Further, even when the plunger 14 moves until the preload spring 19 comes into close contact with the brake slackening operation, the inner peripheral side and the outer peripheral side of the preload spring 19 communicate with each other through the gap G and the above gap. Since the passage to be used can be used as a liquid passage, the loosening does not occur.

Further, since the spring bearing 18 is press-fitted into the lid member 4 that houses the sealing member 13, the sealing member 13 is held by the spring bearing 18 and the lid member 4, and is sealed when the lid member 4 is assembled to the tubular member 3. Element
No displacement of 13 occurs.

Further, in the spring receiver 18 which is press-fitted into the fitting recess 9b of the recess 9 of the lid member 4, the cut-out Y portion is a gap G between the inner peripheral surface of the recess 9 and the outer periphery of the sealing member 13 being visible. Therefore, before assembling the lid member 4 to the tubular member 3, it is possible to easily confirm the direction in which the sealing member 13 is installed and the elastic contact state with the inner circumference of the recess through the gap G, so that the sealing failure is surely prevented. Can be prevented.

Further, since the spring receiver 18 is a flat plate and has no directivity when press-fitting, the spring receiver 18 may be press-fitted in any direction, the efficiency of the press-fitting work can be improved, and the preload spring due to reverse assembly can be improved. Of the tension of (the deviation of the decompression control start point)
Can be prevented.

[Effect of device]

As described above, the present invention is configured such that the spring bearing for receiving one end of the preload spring is formed into a flat plate ring having an outer peripheral shape having cutouts at a plurality of positions and is press-fitted into the recess of the lid member in which the sealing member is mounted. As a result, since there is no directionality and a small press-fitting force is required, it is easy to install and prevents displacement of the sealing member, and also causes poor sealing performance before mounting the lid member to the tubular member. You can check.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a view taken along the line II-II in the above embodiment. 1 ... Main body, 2 ... Inner hole, 3 ... Cylindrical member, 4 ... Lid member, 9 ... Recess, 9a ... Fitting recess, 13 ... Sealing member, 14
…… Plunger, 19 …… Preload spring, 21 …… Passage, 24…
... Valve device, A ... outlet chamber, B ... inlet chamber, C ... pressureless chamber, a ... arc part, Y ... cutoff, Z ... inner hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-67550 (JP, A) Actually opened 59-97155 (JP, U) Actually opened 60-134070 (JP, U) JP-B 58- 57333 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A body having an inner hole, a plunger movably arranged in the inner hole, an inlet chamber and a pressureless chamber formed at one end of the plunger, and a plunger formed at the other end of the plunger. An outlet chamber, a passage connecting the outlet chamber and the inlet chamber, a valve device provided in the passage and opened / closed in accordance with movement of the plunger, and the plunger in a direction to open the valve device. The main body is formed by combining a tubular member having an opening at one end and a lid member having a recessed portion that closes the tubular member and opens inside the tubular member. The preload spring is stretched between a spring receiver that abuts against a member and the plunger, and a sealing member through which one end of the plunger penetrates is housed in the recess of the lid member. Can be elastically contacted to the peripheral surface and the outer peripheral surface of the plunger In a certain fluid pressure control valve, the spring receiver has a flat ring shape having an inner hole into which the plunger is loosely fitted and an outer periphery thereof having a plurality of cutouts, and is press-fitted and fitted into a recess of the lid member. A hydraulic control valve, wherein the recess is covered, and the cutout defines a visible gap between the inner periphery of the recess and the outer periphery of the sealing member.